lil labels the line according to legend
if ~isnumeric(arg),myfigure(gcf);linelabel off,return,end
else arg is figure number
%NOTE: Interact with your plot after each call to linelabel
s = sin(2*pi*linspace(0,1)')*(1:1:5);
lh = plot(s);
linelabel(lh) %Number with index.
%Click on lines to label values.
%Click and drag to move label
%Right click to delete.
linelabel off
%Existing line labels are locked in place; can't add more
linelabel(lh,11:15) %Provide your own numbers
linelabel(lh,{'scott','writes','useful','MATLAB','utilities'})
%Provide your own custom labels
legend({'Ch1','Ch2','Ch3','Ch4','Ch5'})
linelabel(lh,'legend') %Automatically use the labels from the legend.